Malicious PDF — malware analysis report

Static analysis result for SHA-256 da8de1d9aaa5ff7e…

MALICIOUS

PDF

124.5 KB Created: 2021-04-04 07:04:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92704c75243d3d72c9e2cd98c89a433b SHA-1: 43093b323d0b052029e81ed8b087894cba8a0568 SHA-256: da8de1d9aaa5ff7ee59e41cb99c9573f112348244a47ce076b44b17ab139f54e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to 'bologen.ru', which is likely part of the phishing lure. While no scripts were explicitly extracted, the PDF structure and the nature of the embedded URI suggest an attempt to redirect the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://bologen.ru/award?keyword=phenolic+compounds+pdf
    • https://cdn.sqhk.co/kajutizikodu/cjbuIhf/brain_training_games_improve_your_memory.pdf
    • http://wodunobogigav.22web.org/chemistry_structure_drawing_software_free.pdf
    • https://levavago.weebly.com/uploads/1/3/5/3/135343263/borekosu.pdf
    • https://banetopebored.weebly.com/uploads/1/3/4/8/134874573/7090706.pdf
    • https://cdn.sqhk.co/rufebumu/iiaIwje/73228685348.pdf
    • https://pokifuduxorimib.weebly.com/uploads/1/3/4/5/134501468/046764b7e1d022.pdf
    • https://lomelamul.weebly.com/uploads/1/3/5/9/135994015/zopironuf-fuponisibetid-talesano.pdf
    • https://cdn.sqhk.co/fifapupifig/idOchgn/download_aplikasi_gun_shot_fire_war.pdf
    • http://dutipajito.22web.org/how_to_reset_casio_pathfinder_watch.pdf
    • https://cdn.sqhk.co/gawukale/hb6hjgd/6461238146.pdf
    • https://cdn.sqhk.co/daposofoxig/hgjhihb/argentina_visa_application_form_mumbai.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://f05e0dbb-21cf-40ea-8b71-00b8d6f49a3b.filesusr.com/ugd/b09e1d_cb987fbdde084fda9bf73cac0a4105e7.pdf?index=true
    • http://lolofekigosot.epizy.com/rules_for_a_knight_free_download.pdf
    • https://8d90b851-447f-4cfc-ac95-1e867b71b983.filesusr.com/ugd/b371d9_e80639d8028e45e8831e5306d2c9be65.pdf?index=true
    • http://susesibukof.epizy.com/20415157036.pdf
    • http://kewumexor.epizy.com/60137283801.pdf
    • https://uploads.strikinglycdn.com/files/bf0f85a6-2c7e-41bb-8e31-8a9a54f21106/what_is_the_major_difference_between_descriptive_ethics_and_normative_ethics_quizlet.pdf
    • https://uploads.strikinglycdn.com/files/d5512b6c-0923-4205-a8f9-e4a734590f2b/business_communication_major_careers.pdf
    • https://uploads.strikinglycdn.com/files/fb3d1f34-c80a-4b18-ba71-df6076bb756c/bavisorulotijesokibaxuj.pdf
    • https://uploads.strikinglycdn.com/files/29168cd4-583a-4be9-add3-b8a608b92220/where_does_the_water_pan_go_in_a_masterbuilt_electric_smoker.pdf
    • http://biwevugiwuk.epizy.com/amiina_al_mufti.pdf
    • http://kawuduzan.rf.gd/arnold_renderer_for_maya_2016.pdf
    • https://a179b4bb-f9e1-4b0b-8685-f881d2afde68.filesusr.com/ugd/0fdb6d_f0f0774b11d14284b486d81e30f114b3.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a830.bin
7b751edb3292538183896d5cf52fff58a74f234da39607f4b0eeefb2dcf23738		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A830 5092 bytes
font_01_sfnt_off0001b967.bin
a5929185d7e725d171691fb17a1c809412796621c6af003ac301ef9bcffa65d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B967 13888 bytes

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